Velocity measurement 30 Astrophysics 10 Extrasolar planets 8 Radial velocity measurements 8 Magnetic fields 6 Magnetohydrodynamics 6 Mathematical models 6 Radiation 6 Stars 6 Sun 6 Velocity 6 Bifurcation (mathematics) 4 Boundary layer flow 4 Clouds 4 Coronal mass ejection 4 Coronal mass ejections (CMEs) - Solar wind - Interplanetary medium 4 Electrodeposition 4 Electrolytes 4 Expansion 4 Fluidized beds 4 Interplanetary medium 4 Interplanetary spacecraft 4 Ionization 4 Magnetic fields - Magnetohydrodynamics (MHD) - Sun 4 Magnetohydrodynamics suns 4 Optical bistability 4 Orbits 4 Parameter estimation 4 Planetary system 4 Radial velocity 4